Which risk increases following alluvial terrace abandonment near a waterway?

💡 Explanation

Slope instability increases because the reduced deposition from the waterway causes increased differential weathering and therefore higher rates of gully erosion, rather than an increase in soil salinity or aquifer decline under the terrace.

• Which mechanism amplifies magma production beneath island arc volcanoes during subduction?
• Which risk increases when groundwater extraction nears alluvial fans?
• Which mechanism increases liquefaction risk in saturated silty sediment layers upon seismic wave propagation?
• Which process limits reservoir capacity affected by heavy sediment load in an alluvial river?
• Which consequence results when katabatic winds encounter a strong temperature inversion near a valley floor?
• Which effect accelerates river avulsion on a broad alluvial plain with high sediment load?